@Ambi Tamber To use the news API please use the following in your request URL and the subscription key should be part of the header instead of the query parameter. You can run a GET query with the following details:
https://api.bing.microsoft.com/v7.0/news/search?q=microsoft
Header for this request should be your key:
Ocp-Apim-Subscription-Key: <your_key>
P.S: I have updated the post to remove your keys.